Oil-burner construction



Apr, 24, 1923; 1,452,559

J. c. JOHNSON OIL BURNER CONSTRUCTION Filed March 23, 1922 2Sheets-Sheet 1 HI I It 4 z I L// 7 58 5 IIH u INVENTOR JESSE Cw J0HN 50NZ ZZaZmgM A 7'TORNE Y Apr. 24, 1923.

J. C. JOHNSON OIL BURNER CONSTRUCTION Filed March 23. 1922 2Sheets-Sheet 2 INVEN TOR @5555 c. JOHNSON UNITED STATES Patented Apr.24, 1923.

1,452,559 PATENT OFFICE.

JESSE C. JOHNSON, OF SAN FRANCISCO, CALIFORNIA.

OIL-BURNER CONSTRIfCTION.

To all whom it may concern:

.Be it known that I, Jnssr. CLAUDE JOHN- SON, ac-itizen of the UnitedStates, residing at 1337 Mission Street, San Francisco, in the county ofSan Francisco and State of California, have invented certain new anduseful Improvements in Oil-Burner Construction' and is more particularlytions, of which the following is a specification. 1

The present invention relates to certain improvements in crude oilburner construcan improvement in the general class described and set'tively, and owned by me.

forth in United States Letters Patent No.

1201999 granted to me October 17, 1916;

' and Letters'Patent granted to Seward T.

Johnson, January 30, 1905., and November 21, 1911, Nos. 781,284, and1,009,525. respec- It is the object of the'present invention to providea crude oil burner construction of the type disclosed in the saidpatents,

which shall embody certainimprovements to better adapt it for thepurposes intended.

The particular features of this invention consists in certain mechanicalformations of the liquid fuel oil burner, the oil supply connectionstherefor, and of means providin superior advantages in point ofaccessibi ity and general efficiency by suspending the whole burner uniton a pedestal near the Y furnace door capable of'swinging'relativelythereto. g I

The present device contemplates the arrangement within ahollow burnercasing of. a motor, the shaft of the latter operatinga rotary pump and.a set of fan blades within the said casing, as well as revolving anatomizer positioned at the mouth of the burner casing.

Another object of this invention is'to provide an arrangement inwhichthe air sup- I ply to the fan blades is effectively utilized combustionfluid. 1

Another important object of the present 1n the operation-of cooling theworking parts of the motor, and the air, thus pre-heated, facilitating amore perfect atomizing of the invention is to provide a burner with anovel form of fuel control means, the same operating in a manner toreduce the flow of fuel oil to the burner head automatically-said meansbeing controlled by the temperature of the water, or other medium heatedby the burner.

This invention possesses other advantaing and Application filed March23, 1922. Serial No. 545,989.

geous features, which, with the foregoing tionary fan blades upon line11-11 of I F ig.'1;

Fig. 3, is'a vertical plan view of the revolving fan blades upon lineI-'-I of Fig. 1; Fig. 4, is a front view of the burner and the oilsupply connections without the motor and partly in section; i

Fig. 5, is a cross sectional view of the motor upon line IIIIII of Fig.1;

Fig. 6, is a perspective view of the mani fold of the burnerwith theburner and its coupling omitted;

Fig. 7, is a plan view of the latch showing its mode of operation inrelation to the burner casing;

Fig. 8, is a plan view of the dial of the oil supply regulating valveFlg. 9,'is a horizontal plan view of the curvedarm of the manifold;

Fig. 10, is a sectional enlarged view of theatomizer; and r Fig. 11 is across sectional view of the atomizer upon line I -I of Fig. 10.

\Vhile the present device is employable wherever a burner is desired,the same is especially adapted for furnace use and is herein illustratedin connection with a firebox 10,.formed of brick work 11 and having aprotecting plate 12, having an opening formed therein provided with anexchangeable portion 13 of frusto-conical form, proje-cting within thefire-box and having a flange 14. I

Formed integral with the plate 12, or otherwise secured thereto is apedestal bracket 15, provided with journal bearings, comprising thepillow 16, and the cap 17, having screws 18, withsetnuts for adjustment,as

shownon Figs.4 and 6 respectively. 7

Journaled. within the said bearings is a manifold, comprising a tubularcentrally divided vertical standard portion 19, having a horizontallydisposed centrally positioned curved, or quarter bend twin tubular -armportion 19*, integral therewith and flanged as at 25. Thetwin tubes ofthe said arm portion 19 of the manifold diverge at their points ofmeeting the vertical standard portion 19, of the manifold, one of thetubes ascending, and the other tube descending withinthe vertical.standard portion of the manifold.

.Hollow pintle members 20 and 21, the inner ends of which are connectedwith the upper and lower ends Oftlll: manifold by packing glands 20 an'd21. provide rotatable swivel connections througha pipe 23fwith anysuitable 'oil supply, and through a pipe 21, fora return flow of excessoil, thus .forming two distinct and independently acting tubularconnectionsforan Oll supply,

and foran excess oil return flow to, and from a pumping system 26,respectively, and

adapted to swing laterally in substantially a horizontal plane.

I The two tubular terminals at theflilange' -25, of the manifold armbeing in alinement with their respective ports of the pump 26.

' The said manifold standard and its arm portion preferably constitute asingle casting, reinforced by a web as at 19*, to secure the rigiditynecessary for the different purposes for which it is intended.

I The flanged end of the manifold arm, and a"pump of suitableconstruction, are con- .nected together by bolts passing through theirflanges at their meeting ends.

-Referring to Fig. 1, the hollow burner casing 27, which issubstantially circular in cross section, somewhat enlarged in crosssectional areanear its rear end as at 28, 1S

at the rear extremity or discharge end there- -of constricted, forming atapered mouth portion 29, ending into an annular air nozzle 30." Thesaid casing may be of any suitable construction, and in the form shownis composed of several sectlons suitably connected together by" boltspassing through lugs at their meeting ends.

Formed integral with the tapered mouth portion '29 of the casing, is anannular lug 31, shaped to meet and set against the outer flange 14, ofthe frusto-conical portion 13.

To secure the position of the said lug 31, of the motor casingto thefire-box plate 12, a latch bar 32, pivoted to the fire'plate 12, as at33, havinga suitable milled set screw 34, ier azdjustment is provided asshown on Es shown on Fig. 1', the propelling shaft 35, of the motor 36,projecting inwardly of the casing 27, is centrally journaled within the"said casing and supported therein by means ofball bearings 37 and 38,the outer end of the shaft being extended as shown,- having the axle 39,of the fanblades 40, at-

tached thereto. The fan blades l0 are consuch blades being provided inany suitable number, while the blades may be formed of slight curvatureif found desirable.

Stationary blades 41, are secured to the inner side of the casing as at43, being designed to direct the'air properly into the annular airoutlet passage 44, and to prevent any rotary movement of the air;

A novel feature of the present improvement is the mounting andconstruction of the burner inclosing casing part.

Referring to Fig. 1, it will be seen that the burner casing covering themotor consists of two parts. One of the said parts forming a suitablecover 45 for the motor terminals, having aflexible conduit 16, carryingthe usual electric wires from a source of electricity, not here shown,is secured by bolts or in any suitable manner to the motor casing part27, which is secured to the air duct extension 47 by suitable means.This casing part 27, enveloping the motor, being to some-extent'largerthan the circumference of the motor, is suitably spaced therefrom,forming channels 48, around the said motor, an air intake opening 49, isprovided in the said casing, the airbeing admitted through a screen 50to prevent injury to the motor by dust entering through the saidopening. i

These channels are provided for the double purpose of effecting thecooling of the motor, when running, and of pro-heating the air supplypassing through the air duct 17, to the fan blades.

An oil dispenser 51, in the form of a sleeve and having an oil chamber52 therein, is secured with'iuthe central opening of the air dischargepassage 44.

' The outer end portion of the shaft 35. is reduced as at 53, upon whichis secured. a sleeve 54, terminating in an atomizing plate 55, outwardlyof the free ends of the oil dis enser. I plurality of metallic plates56, are dependently carried by the inner plate 55, being secured theretoby spacings 56, being preferably arranged between the said plates.

The outer wall of the oil, dispenser 51 is drawn inwardly and flangedatiits outer end as at 57, for the purpose of contracting the outletopening of such dispenser while the inner wall thereof isof greaterlength than the outer wall and is reduced as at 57, the 1 comparativenarrow outlet of the dispenser l 51, being thereby positioned'beneaththe said atomizing plates 55 and 56 respectively.

The inner atomizing plate 55, having a somewhat enlarged cross sectionalarea relatively to the adjoining atomizing plates is provided with aforwardly projecting annular flange 57, surrounding and extending beyondthe atomizing plates 56, whereby, when the atomizer is revolved at agreat speed, the fuel oil is atomized and sprayed out into the fire-boxin a plurality of lines or streams extending radially toward the airdischarge passage and laterally toward its open end.

A securing boltv 58, extends inwardly axially of the axle 35, and isprovided with a Washer 58?, overlying the outer plate of the atomizer,the said bolt terminating in a head 59, whereby the bolt may be properlypositioned, it being understood that the latter is preferably threadedinto 'the said axle.

The pump 26, being supported with relation to the propelling shaft 35,by means of a bracket like casing part 60, and is bolted at right anglesto the burner casing 27. being directly driven from the propelling shaftat reduced speed by means of a worm gear drive generally indicated as at61.

From the foregoing it will be apparent, that by these novel features ofconstruction of this burner arrangement. the burner may be swung to, oraway from the furnace opening,-as the whole unit is carried by themanifold 19, rotatably mounted to the pedestal bracket 15, withoutdisturbing the 011 supply or its connections.

Another novel feature of th1s burner construction as shown on Fig. 4, isa possibility I adjacent to and in operative position to the pump shaftpacking 26",to stop a leak of oil at this point, the other end of thesaid bar extending upward through an opening 62*, provided in the casing26 and exterior thereof, the tightening up of the pump pack- -ing can bedone while the burner is in o eration, by manual adjustment of the saidlatch bar by means of a threaded bolt 63, positioned exterior of thesaid casing.

The arm of the manifold is provided with a boss 64, carrying an; oilregulating valve 65, the stem 66 of this valve having a central bore 67,with an open end 68, the said valve stem being capable of a turningmovement within its casing by manual adjustment of the pointer 69.moving over a graduated dial 70. A chamber 71. formed at the side of thevalve case 65, communicates through the ports 72 and 73 with the bore 67"of the stem 66. An oil pipe 74:, is connected to the open end 68 of thevalve stem '66. The chamber 71 is located within the "return flowconduit pipe 24, a graduated pressure gage, generally indicated as at75,

having an indicator, showing the existing oil pressure within the saidreturn flow conduit, is suitably mounted therein.

The, oil from the pumping system enters ports 72 "and 73 to the pipe 74and the oil burner connected therewith. A nearly con-' conduit, and theoil supply from this con duit to the burner is adjusted by theregulating valve 65, a control valve 76, having a stem 77, is positionedadjacent thepressure gage 75 and being operated by the oil pressuremaintained by the pumping system within the return flow conduit.

Secured to the upper part of the casing of the valve 76, is ayoke 78,carrying a set screw 79 for adjustment.

Pivotally connected to this yoke as at 80, is a lever. seating its shortarm 81 upon the valve stem 77. A steam pressure regulator, on top of theboiler, not shown in these drawings, is connected by suitable means withthe long arm 82 of the said lever. The steam within the boiler, onreaching a certain pressure will open the regulator, thus also -loweringthe lever arm 82 connected with it, The downward movement of the arm 82,causing the short arm 81, to release in an upwardly direction the valvestem 77, thus enlarging the passage chamber of the said valve andpermitting of a larger quantity of fuel oil to pass through the returnflow pipe 24 to its source.

Thus it will be seen, by the release of this valve in this manner, thepressure of oil within the chamber adjacent the regulating valve 65, isthus automatically relieved. reducing the oil supply to the atomizer ofthe burner, by allowing more oil to return through the return flow pipe,and incidently reducing the fire underneath the boiler.

The complete operation of the device will be apparent from the presentdetailed description thereof; it being understood that when the burneris desired for use, the motor 36, is started in operation, the turningof the motor shaft 35. effecting revolving'of the rotary pump system. ofthe fan blades as well as the atomizer, while oil is conducted into theoil chamber 52 through the pipe 74, the oil being reduced to a finespray as it leaves the oil dispenser 51, being deposited within theatomizer. The atomizer, when revolving at a high speed. causes the oilto be discharged by centrifugal force through the spaces separating theatomizing plates 55 and 56. Simultaneously with the discharge offuel oilfrom the atomizer, occurs a fiow of air from the fan blades .40, furtheratomizing the fuel oil and throwing the same forward into the fire-box,there readily bursting into flame when ignited. The air intake beingdirected around the motor by channels 48, before entering the air duct47. to supply the fan blades, provides for a continuous air cooling ofthe motor when inoperation, and the air supply thus preheated.materially facilitates a perfect atomizing of the fuel oil.

The pumping system is directly connected against a corresponding flangeon the firebox plate, when the burner is in "a closed position,- beinglocked against movement'- when in the said closed position by anadjustable latch bar 32. Connecting the oil supply pipe, 23 andthereturn flow pipe 24 to the manifold by hollowpintles 2 0 and 21respectively, permits of the manifold to turn on a vertical axis withoutdisturbing the oil supply nor the oil return flow connections to theburner unit.

.The materials and finish of the several parts of this burnerconstruction are such as the experience and judgment of the manufacturermay dictate,

' Having now fully described 'my invention, what I claim and desire toters Patent is e i I 1. In a burner of the type specified, a pedestalbracket, a plurality of journalscarried by said bracket, a manifoldjournaled therein, comprisinga vertically disposed part having a quarterbend horizontally disposedv arm part, centrally positioned and integraltherewith, said manifold being adapted to swing laterally insubstantially a horizontal plane, a plurality of independent tubeswithin the said manifold, said tubes on leaving the horizontallydisposed arm part, di-

verge, one of the said tubes ascending, andthe other of the said tubesdescending within the said manifold, hollow pintle members in alinementwith said tubes, rotatably secured to the upper and lower ends of themanifold, thus forming distinct conduits for-an oil supply, and forthereturn flow of oil to and from the burner respectively. a. manuallyoperated oil flow regulating valve, having a dial-andan indicator,carried by the horizontal arm part of the manifold, and positionedwithin the said return flow conduit, and of means for the delivery ofoil from the said regulating valve to the burner.

'2. In an oil burner of the type specified, in combination with a pumpcasing provided with an opening, a driving shaft, a packing glandmounted on said shaft, a latch bar pivotally mounted on said casing, theinner end of the said latch bar being inclined and slidable over thedriving shaft in spaced re:

lation thereto, engaging the-packing gland, the outer end of the latchbar extending exterior ot the casing opening, means exterior protectLetof the casing for adjustment of the latch bar to the packing glandrelative to the driving shaft, to prevent binding of the packremovablyattached thereto adapted to projeet into the fire-box, a hollow said fancasing part having a contracted mouth portion forming an air outletpassage, an annular flange integral with the said contractedmouthwportion adapted to'form a closure for the said fire-box opening,of means pivotally mounted on the said fire-box plate to keep the burnercasing in a closed position, an atom'izercomposed of a plurality ofatomizing plates, positioned ceirtrally of the said mouth, an aircirculating fan within the said casing adjacent the' inner open end ofthe said passage, directingw means for the said a-irblast, an oildispenser having anoutlet adjacent the said atomizer, an oil supply pipefor the said oil dispenser extending through the said casing, adjustablepressure means regulating the said oil supply, rotating means for thesaid fan, the

said atomizer and the said oilpressure, of

means securing a rotatably mounted tubular manifold arm to the saidfire-box plate, and of means for securing the said burner casing to thesaid manifold arm to swing on a vertical axis to, or away from the saidfire-box opening.

5. In an oil burner construction the combination ofa fire-box plate, apedestal bracket secured thereto, journals carried by the saidbracket,-a manifold arm journaled therein, comprising a centrallydivided tubular vertical standard part, having a vtwin burner cas- 'lnghaving an enlarged fan casmg part, the

tubular quarter bend horizontal arm part integral therewith .andcentrally positioned thereto, a pumping system having a casing, of meanssecuring the said pump casing to the said manifold, the twin tubes ofthe said manifold being in alinement with thei r re spective ports ofthe pumping system. a burner easing bearing a motor having aprojectingshaft, an atomizer removably secured to the free end of the said shaft,fan blades carried by said shaft, of means securing a. hollow burnercasing to the said pump casing substantially at right angles to the planof the said pumping system, a hollow pintle member secured at one end tothe upper end of the vertical part of the said manifold, and with theopposite end to a source of fuel oil supply; a second hollow pintlemember secured with one end to the bottom end of the saidvertical'manifold part and with its opposite end to a return flowconduit, :1 control valve having a dial and a manually operated pointer,being carried by the horigage to retard the return'flow of thefuel oilbelow a predetermined pressure.

6. In the combination of an oil burner construction, a motor drivenpumping system having a shaft, packing surrounding the said shaft, acasing inclosing the pumping system having an opening formed therein, asliding latch bar pivotally connected to the said casing, the lower endof the said latch bar riding on the said pump shaft in operativeposition to the said packing, the upper end of the said bar extendingupwardly through the said casing opening, of means exterior of the saidcasing for manual adjustment of the said latch bar.

7.. In an oil burner construction, a-hollow burner casing having an airinlet opening and a constricted end portion provided with an airdischarge opening, .a longitudinal shaft journaled within the saidcasing, fan blades carried by the said shaft, anatomizer comprising aplurality of atomizing plates removably mounted on one endiof the saidshaft, the said, atomizer having its outer edge arranged in spacedrelation to the edge of the air discharge opening, a fuel oil supplyelement mounted on the shaft, of adjustable means supplying fuel oilunder pressure, a fire-box plate, a pedestal bracket secured to the saidplate, a tubular manifold journaled to the said bracket to swing on avertical axis, having a quarter bend horizontal twin tubular arm,centrally positioned and integral therewith, of means adapting the saidmanifold to carry the said burner casing as a whole unit, to swing to,or away from the said fire-box, and of adjustable means for keeping theburner unit in a closed position relative to the said fire-box plate. qj 8. A rotary oil burner comprising in com- \bination a hollow, casing,having acontracted mouth portion on one end thereof, an annular lugadjacent the said mouth, a fan within the said casing, an air ductformed within the said casing, a motor secured within the opposite endof the said casing havingia projecting shaft, extending centrallyoutwardly" of the said con; tracted mouth, means for admitting airaround the said motor, of means conducting the air to the fan blades, ofmeans rotating the said fan blades to force the air through the saidmouth, an oil feeding member carried; by the said casing, of pressuremeans for the said feeding member, of means controlling the saidpressure means exterior of the said casing, a fire-box plate having aformed opening therein, an annular lug surrounding the said opening, apedestal bracket secured to the said fire-box plate, a manifoldjournaled to the said bracket, hollow pintle members secured to thehpper and the lower ends of the said manifold, acentrally divided tubewithin the said manifold, an arm integral with the said manifold havingtwin tubes, the said twin tubes being in alinement with thecentrallydivided tube of the said manifold, forming by means of the said pintlemembers conduits for a fuel oil supply and for a return flow ofexcessive oil respectively, of means securing the said manifoldcentrally at right angles to the said burner casing, to carry the burnerunit when swung to, or away from the said fire-box opening and of meanskeeping the burner un1t"in a closed POSl'. tion relative to thesaid'fire-box plate.

9. An oil burner construction comprising in combination a fire-boxopening with a fire-box plate having a centrally located frusto-conicalelement removably attached thereto, an annular lug surrounding the saidelement, of means securing a pedestal bracket to the said fire-boxplate, ournals carried bythe said bracket, a manifold arrucomprising acentrally divided tubular vertical standard having a twin tubularquarter bend horizontal arm integral therewith, rotatably mounted to thesaid bracket, adapted to swing on a vertical axis,.a'fianged end on thesaid arm, a rotary pump having a casing secured to the said flanged end,the twin tubes of the manifold arm being in alinement with the ports ofthe said pump, hollow pintle members secured to the upper and lowerendsof the said manifold, an oil supply pipe connected tothe upper saidho'llowpintle member'of the said manifold, an oil return flow pipeextending from the-lower hollow pintle member of the said manifold, apressure gage'and an automatically operated release valve within theconduit of the return flow pipe, a worm gear to rotate the said pumpfwithin the said casing, the said pump having" casing positioned at rightangles to the said worm gear casing and secured thereto, the

said burner casing being as a whole unit portion, an annular lug nearthe said mouth to seat against the frusto-conical element of thefire-box plate,'a latch pivotally mounted to the said fire-box plate tohold the said burner casing in position, a propelling motor within thesaid burner casing and spaced therefrom, having a projecting shaft, fanblades carried by said shaft, an atomizer removably mounted on the freeend of the said shaft, centrally of the said mouth, forming an airpassage between the said atomizer and the said mouth, an air circulatingfan within the said casing adjacent the inner open end of the saidpassage, an annular oil dispenser carried by the said shaft having acontracted cured in the said arm of the manifold in alinement with thereturn flow pipe, of means forming oil supply connections between theoutlet of the said valve and the said atomizer, the said connectionsextending through the said casing, of means for the admittance of air tothe said fan blades, said means comprising channels surrounding themotor, an air duct formed Within the burner casing and of means forcontrolling the direction of the air blast within the said casing.

In testimony whereof I have allixed my signature in the presence of twowitnesses. JESSE C. JOHNSON. Witnesses:

M. CHRISTENSEN, A. J. BRADLEY.

